Automatic broaching machine



March 13, 1934. F, J. LAPOINTE 1,951,194

AUTOMATIC BROACHING MACHINE Filed Aug. 8, 1930 5 Sheets-Sheet 2 Mach 13, 1934. r J, LAPOINTE vAUTOMATIC BOACHING MACHINE Filed Aug. 8, 1950 5 Sheets-Sheet 3 wn HA v D \\D. H 0.. Q L HH Z k 0N 47 o f. i 7/ l LVW@ M \\Mw n rlH HH ll. o Z VILL, "l IIE J m J f z hulVlllll f YC E A .J m L 1 im: EEE N 1. 5 05 7 5 7 8 7 7 M .1 .l O 5 5 A 1 1. o 6 11| 4| O March i3, 34.. F J, LAPOWTE www4 AUTOMATIC BROACHING MACHINE Filed Aug. 8, 1950 5 Sheecs-Sheerl 4 March 13, 1934. F, LAPOlNTE n 1,951,194

AUTOMATIC BRoAcHING MACHINE File'd Aug. 8, 1930 5 Sheets-Sheet 5 eataaiacl iria-t. is, ieee l iipggiipiigi.

uniTaio sTaTas TnTanT @Trice llldgd AlU'Lll/MTHC BllitlitCHllNG MACHINE Francis Il'. Lapointe, Ann Arbor, Mich.. Application August 8, 1936i, Serial No. 474,024 it claims. (ci. sog-sil My invention has for its object to provide an tion of a controlling valve. Fig. l is a vertical ecient pull breaching machine for breaching section of the machine taken on the plane pararticles in succession. It provides a means for allel tothe side shown in Fig. 2. Fig. illustrates manipulating the breach to enable ready placea broken view of the breach lifting mechanism 5 ment of the work or articles operated upon. It whereby the articles may be placed intermediate 6 also provides a structure that economlzes as to the cutting elements of the breach and the drawoor space and enables the attendant to readily head to which the breach is coupled. Fig. 6 illus:1 observe and adjust the manually operated or contrates a perspective view of a socket that is ina- IOI DatS 0f the machine. The major dimension nipulated by the breach lifting mechanism shown i0 of the machine is vertical and the breach operates in Fig. 5. Fig. 7 is a view oi a section taken on 65 vertically which places the parts in position for the plane o the line 'TI- 7 indicated in Fig. 2. ready control by the operator. Fig. 8 is a view of a section taken on the plane of The invention also provides a means for supthe line 8-8 indicated in Fig. i", and. illustrates porting the bIO'Ch in SllCh'af elaiOn t0 the dlaW- a transverse sectional view of an article receivhead that the articles may be readily inserted in ing member which is operated by the feeding breaching position in succession to a point intermechanism of the machine. Fig. 9 is a view of mediate the drawhead and the cutting elements a, Section taken on the plane of the line 9-9 indiof the breach dunne the uninterrupted reeiprocated in Fig. 2, and illustrates a view of a section.l cation of the breach. It also provides a means of a, valve used for controlling the feeding mechafor the delivery of the articles laterally from the msm of the machine, Fig i0 is o, diagydmndtio 75 bOuCn Operating mechanism illustration of the pressure system used in con- The invention further provides means for autonoci-,ion with the breaching machine. matielly releasing the blOafCh fIOm, and TSCOD- The breaching machine, selected as illustrative necting the breach to, the dravvhead for the inof the vai-ions embodiments of the mvention, is sertion of the articles in succession between the provided with o, Work pidio 1 that is Seoul-od to the so drawhead and the cutting elements of the breach, from@ 2 of the machina The breach drawhead and a means, Operated in unison With the Opera'- 3 is connected to a reciprocable cylinder 4 and. tions of the breach for feeding the articles to be is provided with on automatic coupler 5 for conoperated upon to the broaeh- The drawhead of netting the breach s with the drawhead 3. The "0 the breach is preferably located above the Work drawiriogdy 3 is rooiproooi-,od above the work piai-,o 85 plete and is operated by e nxed piston located 1 by a hydraulicl means located above the work Well above the work plate, the drawhead being piate for drawing the breach upward by. the hy- COIIDeCted t0 the upper end 0f u TeCDIOcable Cyldraulic pressure. Oil under pressure is directed inder which is operated by the fixed piston Wherefrom the upper end of the machine through a by rigidity of construction and maintenance of pipo 9 which communicates with the Source of 90 alignment is aded. supply of oil under pressure through the pipe l0 The invention consists in other features and and o, oontrollmg valve, The pipe 9 fits within advantages which will appear from the following the cylinder head il, the escape of the oil being description and upon examination ofthe drawprevented by a Suitable packing nut 12. 4e ings. Structures containing the invention may The drawhead 3 is located at or below the 95 partake 0f different fOrmS and may be Varied in upper end of the cylinder and above the Work their details and still embody the invention. To plate 1, The piston 'l is also located above the illustrateapractical application of the invention, Work plate l and is supported in position by l have selected an automatic breaching machine means of a fixed cylinder 13 having an exterior embodying the invention as an example of'the dimension that is slightly smaller than the inte- 100 various structures and details thereof that conrior dimension of the cylinder 1l. The cylinder 13 tain the invention and shall particularly describe is rigidly secured to the bed le of the machine the selected structure hereinafter, it being underand the lower end oi the cylinder i is sealed by stoodthatvariationsmaybemade and that certain the packing ring l5 about the cylinder 13. The fo features of my invention may be used to advaninterior of thecylinder 13 is connected to a source 105 tage Without corresponding use of other features, of supply of oil under pressure through a pipe Without departing from the spirit of the invention. 16 and a suitable controlling valve. TheV pres- Fig. l is a front view of a breaching machine sure of the oil'is communicated through the particularly referred te. Fig. 2 is a side view of passageway l'l of the piston fl te the underside of the machine. liig. 3 illustrates a view of a sec the piston of the cylindervand at apoint above the 110 Leonie/i The dogs 60 are provided with engaging teeth 62, while the upper end of the broach may be provided with corresponding engaging teeth, the teeth of the dogs and the teeth 53 of the broach interengage when the lever 55 is released and the upper end of the broach is located between the dogs. Preferably, the interengaging teeth of the dogs and the broach are made in the rorni o V- threads which provides ready and secure interengagement between` the parts.

As the drawhead 3 completes its return stroke, the lever 55 is engaged by a latch 65 that is pivotally supported on a suitable bracket or on suitable lugs 65. One end or" the latch is free to move upward as the end of the lever 55 is moved upward in the upward movement o the drawhead 8. .as the drawhead 3 completes its strolre the latch 55 releases the dogs 50 and allows the breach to drop through the opening 87 oi the work plate. Z-`referably, the lower end o the breach `5 is received by means or a socket 'l0 into breach d is stepped, as it is released from 'the drawhead, the socket 79 being connected, to a means for permitting its descent to a 4poi t below lower end of the work that may be the underside of the work plate.

c sachet *lo is adjustably connected to a cylby rneans ci? the bolts l" and e raclet 73. socket 'lil is supported on ti" aclret 73. bracket 73 is adjusted accorc l the lengt"A i "he broach 6 used in broaching t e bushings to permit withdrawal and reconnection of the breach from and with the dran1 ead 3 and through worlr. lThe cylinder ill. is provided with a 'Fixed piston 74, the piston le be nrovided with a hollow piston rod that communicates with the interior of the upper end of the cylinder tlnrough the openings 76. The upper end of the cylinder is sealed by a suitable packing nut 77. The piston rod l5 is connected with a source of supply of oil under pressure, means or" the pipe 78, whereby the cylinder may be raised to raise the broach 6, and to push. the dogs 60 or the coupler 5 to one side and enable the connection of the broach with the drawhead.

The cylinder 7l is guided in its movements by means of a pair of sleeves '79 slidably located on rods 80 that depend from a bracket V8l that is connected to the frame 2 or" the machine. 4

Preferably, the cylinder '7l is controlled in its operations by means of the slide valve 29. lt is connected to the pipeA l0 and the oil pressure is transmitted to the upper end of the cylinder '7l as well as to the cylinder 4. This will rst raise the cylinder '71 to connect the broach to the drawhead by reason of the fact that the cylinder 71 is much lighter in weight and merely carries the broach 6. Upon completion of the stroke of the cylinder 71, the cylinder d will immediately be raised to draw the broach through the work plate. The cylinder 71 will thus be held in its raised position by the pressure of the oil in the pipe 10 which produces the upward movement of the cylinder 4. When the slide valve is shifted to connect the pump 2l with the under side of the piston 7, the pressure of the oil produced in the pipes 9 and 10 by the forced downward movementof the pressure of the oil below the piston '7, will still maintain suicient pressure within the cylinder '71 to hold the cylinder in its uppermost position and in position to receive the lower end of the broach 6. When the lever is enga ged by the latch the lower end of the broach is located within or near the upper end of the socket and the broach is dropped to the bottom of the socket. Upon the completion of the downwardmovement of the cylinder fi, the pressure within the cylinder 7l is sufficiently reduced such that the weight of the cylinder 'll and the broach 6 is sufficient to press the oil through the pipe 78, the valve casing of the slide valve 30, and the pipe 2li to the reservoir 23. After the broach has descended well below the work` plate l, an article may be placed intermediate the worlr plate and the cutting edges of the broach by the operation oi the slide plate 28. The upper end of the broach may then be raised through the work plate and into the coupling to connect the breach d with the drawhead. This will be produced by the shirting of the slide valve 20 which again directs the oil pressure into the cylinders 7l and d. Thus'the cylinder 'll moves in advance or" the cylinder l because of the' diilerence in the weight of the two cylinders and because of the difference in 'the cross sectional area oi the cylinders proportionate the load that they carry.

The movements of the slide valves o the inachine, to bring about the sequential operations oi the machine, is automatically controlled by a means that operates in unison with the movements or the cylinder d. An arm 8d is connected to the upper end of the cylinder e. t is provided with a collar 86 that surrounds a rod 8? that is vertically movable within a bracket 89 and is connected to and supported by a linlr arm 9e. The arm 9e is secured to a shaft 9e that is supported in the trarne 2 of the machine. An arm 82 is also connected to the shat 99 and operates the rod 83 which is connected tc the slide valve 2b. Movement or" the rod 87 thus operates through the elements, just described, to shift the slide valve 20 and to direct the oil under pressure the pump 2l into one or the other of the pipes lil or 16.

adjustable collars 85 secured to the rod 87. r-ihe engagement o the collars occurs at the points where it is desired to change the direction orc the stroke of the drawhead 3.

The slide plate 28 which is pressure within the cylinder .40, is brought about by the movement of the rod 88 which is also connected to the arm 8d. The rod 88 is provided with an arm 90 that engages the upper end of the rod 91 to which the slide valve d5 is connected. The slide valve 45 and the rod 91 are spring pressed by the spring 92 located intermediate the valve/)casing i4 and a collar located on the rod 91. When the rod 91 is pushed downward by the engagement of the arm 90, the slide valve is shiftv ed so as to connect the inner end of the cylinder 40 with the pumpl and cause the plate 26 to be moved towards the opening 37 in the work plate l. This is near the completion oi the return movement of the drawhead 3 and shortly before the time that the broach is allowed to drop through the opening 37 by the engagement of the lever 55 with the latch 65. The lower collar 85 is then engaged by the collar 86 located on the end of the arm 84 which Jchanges the position of the slide valve 20 and the cylinder 71 is raised to raise the breach 6 through the bushing located in the pocket 27 of the plate 28 and into' the coupling 5. This is when the cylinder 7l has 93 and an The change is produced by the collar 86 which engages one or the other or the operated by the oil L completed its upward stroke, whereupon the pressure of the oil within the pipe 10 operates the cylinder 4 which is raised to draw the broach through the bushing located within the pocket 29.

The arm 90 is drawn from the upper end of the spring pressed rod 91 but the spring pressed rod j 91 is hem in its position to 'maintain the pocket beneath the opening 37 of the work plate 1 until the cutting elements of the broachusubstantially cover the inner surface of the bushing whereby is maintained in a position to hold the bushing in alignment during the movement of the teeth of the smaller end of the broach through the bushing by the pressure of the oil exerted by the pump 48, the spring pressed rod 91 being held down by means of a latch 95. The latch 95 is slidably supported on avbracket 96 which is connectedto the frameol the machine. The latch is spring pressed by means of the spring 97 located intennediate the end of the latch 95 and the outerM end of the bracket 96. The spring pressed rod 91 is provided with a conical collar 98 which operates to force the latch 95 outward away from the rod 91 when the rod 91 is forced x dovm by the arm 90 until the conical collar 98 is located below the lower edge or surface of the latch 95, whereupon the collar and the rod 91 are engaged by the latch 95 and held in a pocation to permit transmission oi fluid pressure from the pump 48 to the irmer end oi the cylinder 10. When the rod 88 is raised by upward movement of the cylinder 4, the rod 91 is held by the latm 95 until the latch 95 is engaged by the raised boss or cam part 100 located on the rod 88. The rod 88 moves through the outer end of the bracket 96 and throughan opening 101 formed in the latch 95. The latch 95 is pressed by the spring 97 against the rod 88 when theconical collar 98 is located beneath c-r above the latch 95. The rod 88 ailords a limiting stop for the movement oi the latch 95 under the pressure on the spring 97. As the cylinder 4l and the rod 88 are moved upward, the cam 100 operates to shift the latch 95 from its engagement with the conical 'collar 98 to release the spring 92 and cause the slide valve l5 to shift its position which connects the outer end of the cylinder d0 with the pressure pump d8. The plate 28 is then moved outward until the pocket 29 is located in alignment with the pipe 27 and receives the succeeding b to be operated upon by the broerh. The cycle of operations thus continues, the zo. hine automatically operating'to bros/ch cut the articles in succession. i

Preferably, the machine is substantially entirely enclosed by means of the frame 2 which constitutes an enclosing shell. Also, the front of -the mhachine may be covered by means of the plates 105. lf desired, the machine may be provided with a platform 106 on which the operator may stand. Also, a sloping shelf 107 is located beneath the work plate l which operates to discharge the bushings from the machine when they are released from the breach, that is, when the breach has been drawn through each bushing. The bushings drop and strike the inclinedsheli 107 which causes their outward movement. Suitable troughs or chutes may be used iorconveying the bushings to a suitable delivery point. Preferably, the shelf 107 is provided with an openby operation of the cylinder 71, the upper end of the broach will be directed to the coupling 5 to be engaged by the dogs 60. f' The socket 'I0 is, preferably, formed of a collar 112 and a base 109 on wihch it is supported and towhich it is connected by the legs 110. The inner surface oi' the collar 112 is, preferably, conical, the larger diameter being at the upper end of the socket 70. This forms a mouth for receiving the lower end oi' the broach 6 when it is discharged from the drawhead 3; 'Ihe space between the collar 112 and the base 109 of thesocket 70 alfords a means for the discharge of the metal shavings that may drop through the opening formed in the shelf 107. Preferably, the surface of the base 109, beneath the collar 112, is formed conical or convex to discharge the shavings from beneath the coilar into the bed oi the machine. Also, in order to prevent the shavings from collecting on the hollow piston rod and the cylinder 71, a sheet metal apron 113 is located over the cylinder 71. l'n order to enable the escape of any oil that may pass the piston 74 and into the lower end of the cylinder 71, a pipe 115 is connected to the lower end of the cylinder 71 and preierably entends upward to a point well above the base of the machine to prevent the oil that col= lects in the base of the machine from conveying any particles of the shavings into the cylinder 7l upon the downward stroke of the piston and at the same time provide a vent for free downward movement of the cylinder. The upper end of the pipe 115 is, preferably, turned downward as at 116, to prevent any oi the shavings, falling from the shell' 107, from entering the pipe 115i 1. ln a pull broach machine, a work plate, an upright cylinder,` a breach drawhead located above the work plate and connected to the cylinder at the upper end of the cylinder, a fixed piston located above the work plate and within the cylin der the exis of the piston extending vertically,

a stationary pipe extending through the upper end of the cylinder, a second cylinder extending through the lower end of the rst named cylinder and connected to the piston, means for direct-1 ing oil under pressure alternately through the said stationary pipe and the second named cylinder to opposite sides of the piston.

2. lin a pull breach bine for breaching articles, a work plate, a pull breach, a drawhead, a cylinder and piston for operating the drawhead, a coupler for connecting the breach to the drawhead, a second cylinder and piston for moviriglthe broach into operative connection with the coupler, a member for positioning the articles in broaching position between the drawhead and the breach when the bromh is separated from the drawhead, a third cylinder and piston foi-operating the said memben asmlrce of supply of uid under pressure, valves ior controlling the movement oi the uids to the said cylinders, means movable with the drawhead i'or actuating the said valves to pro= duce operative movements ofthe said cylinders and pistons.

3. ln a pull brooch machine, a work plate, a pull breach, a drawhead located above the work plate, a cylinder and piston for' operating the drawhead, a coupler for connecting the breech ing 108 in which ythe upper end of the broach d/to the drawhead, a second cylinder and piston is located when the socket 70 is located-in its l lowermost position and thus maintains the broach 6 in alignment with the' socket 70 andthe coufor lifting the broach into operative connection with the coupler, a member for positioningthe articles in breaching position between the drawhead and the breach when the broach is sepa Gil resido@ cylinders, means movable with the drawhead for actuating the said valves to produce operative movements of the said cylinders and pistons, a shel inclined to the vertical or directing the articles from between the drawhead and the pull breach.

di. in a pull broach inachine, a work plate, va pdl breach, a drawhead located above the work a cylinder and piston for Voperating the drawhead, a couler ior connecting the broach to the drawhead, a second cylinder and piston ting the broach into operative connection the coupler, a :member for positioning the cles in breaching position below the work e and between the dawhead and the breach i the breach is separated from the drawhead, cylinder and piston for operating the said er, a source or supply of duid under pres valves or controlling the movement of the ,s to the said cylinders, means movable wit.'H vliead for actuating the said. valves to ynce operative movements of the said cylinders stone, a shelf inclined to the vertical for ig the articles from between the drawhead e pull the shelf ha n opening ding the breach as it is lirted by the said o, cylinder and piston. n. pall broacli machine, a worlr plate, a pull a drawhead, a cylinder and piston. iing the a coup-le r connecting ach to the drawhead, a second cylinder and moving the breach operative con on with the coupler, a member :or positioning nrticles in breaching position with reference -e breach, a third cylinder piston for ^rating the said member, a source oi supply cluid under pressure, valves cr controlling the movement ci the fluid to the said cylinders, and means for operating the said valves to produce sequential operation or" the pistons and cylinders.

6. in a pull broach machine, worls plate, a breach drawhead, means for reciprocating the drawhead to and from the work plate, a pull breach, the drawhead having means for auto= niatically connecting and disconnecting the breach to and 'from the dran/head, means `for receiving the breach fromthe drawhead and for supporting the broach in displaced relation with respect to the drawhead, the machine having a movable member, means :for moving the member during the movement of the drawhead, automatic means operated by the said movable member for feeding the work to a point between the broach drawhead and the pull broach when the breach is separated fromthe drawhead and when the drawhead is located in proximity to the work plate.

7. In a pull broach machine, a Work plate, a broach drawhead, a pull broach, means for supporting the broach in displaced relation with respect to the drawhead, the machine having a movable part operable periodically according to the movements of the drawhead, means for feeding the work between the broach and the drawhead and having a member actuated by the said movable part or ,the machine when the breach is displaced from the drawhead for causing operation of said means, and means for moving'the broach to connect the broach to the drawhead.

r. In a pull breach machine, a Work plate, a broach drawhead, means for operating the drawaan Vvpull broach, a drawhead,

head, a pull breach, the drawhead having means for connecting the pull broach to the drawhead, means for supporting the broach in spaced relation with respect to the drawhead and for moving the breach to connect the breach with the draws e@ head, means for feeding the work between the breach and the drawhead, and means having a part operated by the drawhead for producing opE eration of the said feeding means,

9. In a pull breach machine, a work plate, a 35 breach drawhead, means for operating the draw head, a pull breach, the drawhead having means for connecting the pull broach to the orawhead, means for supporting the breach in spaced relation with respect to drawhead and for moving the breach to connect the breach with the draw1 head, ineens for feeding1 the w fir between the breach the drawhead, wneans operated periodically according to tlie movement oi' the drawhead ier causing operation ci sai feeding ineens,

lo. .i a poll breach machine, a work breach drawhead, means for operating tl" head, a pull breach, the drawhead having for connecting the crdi bro-ach to the dra head, means supporting the breach in. spaced elae tion with respect to the drawhead and ing the 'breach to connect the broac dratvhead, means for feeding the wo e drawhead, e

acing earl, a seon piston tor ino ng the breach into operative connection with the coupler, a sotice of supply ci fluid under pressure, a menober having a passageway for connecting the c, inf: ders to the said source to. produce breach movem ment oi one cylinder and a working strolre o the bro-ach the other cylinder, 'the said passage way forming a return passageway from the said 12@ cylinders, the pressure in the said passageway during the working stroke and the return stroke operating to retain the second cylinder piston in the breach delivering position.

l2. in a pull breach machine, a work` plate, a pull broach, a drawhead, a cylinder and piston for operating the drawhead, an automatic coupler i'or connecting the breach to the drawhead, a second cylinder and piston for moving the'broach into operative position with the coupler, a source of supply oi fluid under pressure, `a member having a passageway for directing uid to the cylinders from the said source andl directing uid from the cylinders to the said source, one of the movable parts operated by the second cylinder and piston having a proportionate weight materially less than the movable part of the other cylinder and piston as compared to the ratio of the bores of the cylinders for producing movement o' the lighter weight cylinder in advance of the heavier Weight cylinder when the passageway conducts fluid from the source to the cylinders'to produce a broach movement of the other cylinder in advance oi the working stroke of the iirst named cylinder. i

13. In a pull broach machine, a work plate, a a cylinder and piston for operating the drawhead, an automatic coupler for connecting the broach to the drawhead, a second cylinder and piston for moving the breach i5@ into operative position with the coupler, a source of supply or uid under pressure, a member having a passageway for directing iluid to the cylinders from the said source and directing iluid 5 from the cylinders to the said source, one of the movable parts operated by the second cylinder and piston having a proportionate weight materially less than the movable part of the other cylinder and piston as compared to its ratio of the bores of the cylinders for producing movement of the lighter Weight cylinder in advance of the heavier weight cylinder when the passageway conducts uid from the source to the cylinders to produce a broach movement of the other cylinder in advance of the working stroke of the first inamed cylinder, the pressure in the said passageway produced by the return stroke of the heavier cylinder and piston operating to retain the second cylinder in the broach delivering position to receive the broach upon substantially the completion of the return of the nrst named cylinder.

i4. in a vpull broach machine, a work plate, a pull broach, a drawhead, a cylinder and piston for operating the drawhead, an automatic coupler for connecting the broach to the drawhead, a second cylinder and piston for moving the broach into operative position with the coupler, a source oi supply of iiuid under pressure, a member having a passageway for directing fluid to the cylinders from the said source and directing huid from the cylinders to the said source, one of the movable parts operated by the second cylinder and piston having a proportionate weightmaterially less than the movable part or the other the hores of the cylinders for producing movement of the lighter weight cylinder in advance.

e@ weight to cause its ret stroke upon reduction cylinder and piston as' compared to its ratio of,

of the pressure produced by the forced return of the ilrst named cylinder.

l5. In a pull broach machine, afwork plate, a pull broach, a drawhead, a cylinder and piston for operating the drawhead, a coupler for connecting the broach to the drawhead, a second cylinder and piston lfor moving the brooch into operative connection with the coupler, a source of supply of Huid under pressure and a reservoir for supplying iluid to the said source of supply of fluid under pressure, a member` having a passageway connected to the cylinders, means for connecting the said passageway to the said source of supply or iluid under pressure and to the said reservoir, the said meansoperating toconnect the said cylinders to the said reservoir upon the completion of the*working stroke of the first named cylinder and piston, the return stroke of the nrst named cylinder operating to create a pressure for the retention of the second cylinder and piston in the broach delivering position.

16. In a pull breach machine, a work plate, a

drawhead located above the work plate, a cylinder and piston for operating the drawhead, ,a

pull breach, a coupler for connecting the breachto the drawhead, a member having a lsocket for supporting the breach, a second cylinder and piston operable by a pressure less than that required for operation of the first r. w. cylinder and for raising the member to place the brooch in operative connection with the coupler, a source of supply of uid, means for subjecting the duid to a pressure for operating the cylinders and pistons, a. valve for controlling the dow of liquid from the said means to the said cylinders to rst move the second cylinder and upon completion or the'movement of the second cylinder ito move the rst named cylinder, and to retain the second named cylinder in its position until the completion of the stroke of the nrst named cylinder and for permitting the return ol' the iiuid from the rst named cylinder to the soince and maintain a pressure in the second named cylinder until the rst named cylinder has completed its return stroke, the second named cylinder completing its return movement by the weight oi the hroach and parts connected therewith upon the completion oi the return stroke oi the nrst named cylinder.

FRANIS 7. EWE. 

